210results about How to "Reduce melting" patented technology

A method is provided for forming grooves in a polishing pad useful for planarizing a substrate in a chemical mechanical planarization process. The method maintains average velocity as a function of bit diameter to enable groove formation using a rotating bit, whereby grooves can be formed at a higher rate while maintaining high groove quality and low defectivity.

To enable a burnpot for a corn burning stove to be continuously operated, the burnpot has either: (1) an openable bottom with at least a first and second position, one of the at least first and second positions being substantially closed to enable a body of combustible fuel to burn on its upper surface, the other of the at least first and second positions providing an opening, burnpot side wall portions and a top of the burnpot being shaped so as to permit a solid clinker to drop out of the opening in the openable bottom when the openable bottom is in its second position; or (2) a bottom formed as one of a series of sections of a rotatable member so that as the member rotates, it carries ash with it away from the bottom of the burnpot. A combustion volume is provided between the openable bottom or rotatable bottom, the side surfaces and the top, the combustion volume having an upper portion and a lower portion whereby a fire on a combustion surface in the lower portion burns upwardly toward the upper portion so that byproducts of combustion build on the combustion surface to cause burning fuel to burn at a higher level; the higher level having a smaller cross sectional area than the lower portion whereby the byproducts of combustion may drop as a unit out of the burnpot bottom opening. Easy to ignite fuel is moved from one hopper into the burnpot and ignited. When the temperature is high enough to ignite the harder to ignite fuel it is moved into the burnpot and the flow of easy to ignite fuel stopped.

The invention discloses an electric arc preheating repair welding method for a stir friction plug, relates to a repair welding method for the stir friction plug and aims to solve the problem of poor continuous flowability of a material because a stirring needle is broken before complete plastic deformation and flow under the action of strong resisting force of a material at a repair welding position of the stir friction plug. The method comprises the following steps of: 1, performing electric arc preheating on a key hole left by friction stir welding or secondary friction stir welding repairing, namely, putting a circular ring at a key hole position until the center of the circular ring is coincided with that of the key hole, performing electric arc heating on the circular ring by using a tungsten electrode argon arc welding machine at the temperature of between 180 and 200 DEG C and transferring heat to a region needing repair welding after the circular ring is heated so as to preheat the key hole in the region needing repair welding, wherein the central pore diameter of the circular ring is greater than that of the key hole; and 2, performing repair welding on the key hole, namely, during repair welding, moving a welding tool towards a welding direction by 1 to 5 millimeters and allowing the stirring needle to undergo plastic deformation and flow so as to fill the key hole. The method is used for performing repair welding on the weld defects of the stir friction welding and the key hole.

The invention relates to a submerged-arc welding flux for low-alloy-steel narrow-gap welding and a preparation method thereof. A high-alkalinity MgO-CaO-Al2O3-CaF slag system is adopted, and the submerged-arc welding flux is mainly made from raw materials including calcium fluoride, aluminum oxide, wollastonite, marbles, silicon iron and ferromanganese iron. The preparation method of the submerged-arc welding flux mainly comprises the steps of 1 dry mixing in proportion, 2 impurity removal, 3 bonding agent adding for wet mixing and 4 baking and high-temperature sintering. The alkalinity of the welding flux ranges from 2.0 to 3.0, low-hydrogen and low-oxygen deposited metal containing ultra low P and S impurity contents can be obtained through welding, and accordingly it can be ensured that the deposited metal has excellent comprehensive mechanical property. When the submerged-arc welding flux is matched and welded with a low-purity low-alloy steel welding wire, S and P are not added into the deposited metal by adopting the welding flux. The submerged-arc welding flux has excellent alloy transition capacity.

The invention discloses a water-permeable ceramic waste brick and a production method thereof. The water-permeable ceramic waste brick comprises, by weight, 71-79% of ceramic wastes, 3-4% of clay, 8-13% of feldspar and 10-12% of water glass. The water-permeable brick product is obtained through burdening, crushing, mixing, molding, drying, sintering and heat insulation of all above components. The water-permeable brick produced in the invention has the advantages of low sintering temperature, simple production technology, high water-permeable intensity, excellent performances, and greenness and environmental protection.

A method for manufacturing magnetic metal powder is provided. In the method, a powdered magnetic metal oxide is supplied to a heat treatment furnace with a carrier gas composed of a reducing gas. The heat treatment furnace is maintained at temperatures above a reducing action starting temperature for the powdered magnetic metal oxide and above a melting point of the magnetic metal in the powder. The powdered magnetic metal oxide is subject to a reducing process, and then magnetic metal particles, the resultant reduced product, is melted to form a melt. The melt is re-crystallized in a succeeding cooling step, to obtain single crystal magnetic metal power in substantially spherical form.

The present invention provides a glass composition that exhibits a fluorescence function and an optical amplification function in a wide wavelength range. This glass composition includes a bismuth oxide, an aluminum oxide, and a glass network former. The glass network former includes an oxide other than silicon oxides as its main component. The glass composition emits fluorescence in an infrared wavelength region through irradiation of excitation light, with bismuth contained in the bismuth oxide functioning as a fluorescent source. A preferable glass network former is B₂O₃ or P₂O₅. This glass composition further may contain a univalent or divalent metal oxide.

The invention discloses a summer-time face excavation construction method for a high and cold permafrost ultra-long highway tunnel. The summer-time face excavation construction method comprises the steps of tunnel portal excavation and side slope and heading slope protection, shallow-buried tunnel portal permafrost follow-pipe shed construction, shallow-buried tunnel trunk section permafrost excavation and supporting and frozen-earth-section tunnel trunk lining. Before a frozen-earth-section tunnel portal is excavated, a heat-preservation blind drain and a water retaining drive part are arranged in the outside 5 m away from the top of a heading slope and 2 m away from the tops of side slopes in a 'front-cut rear-drive' mode. A positive benching tunneling method is adopted at a frozen-earth tunnel portal section to perform layered and sectioned excavation and supporting, a tunnel portal is pre-reinforced by adopting a large advancing pipe shed, a mining method is adopted at a hidden hole shallow-buried section for construction, a three-bench seven-step excavation method is adopted for excavation, C30 low-temperature early-strength steel fiber sprayed concrete and primary-formwork-lining C30 low-temperature early-strength concrete are adopted to form a double-layer preliminary-supporting structure, and C45 concrete is adopted for secondary formwork lining. By means of the summer-time face excavation construction method, the hole forming difficulty problem can be solved, construction cost can be reduced, a construction period can be shortened, and the like.

An autoignition composition 14 is provided to manage the safe combustion of a primary gas generant composition 12. The autoignition composition 14 contains carboxylic acid and potassium chlorate. A method of managing the safe combustion of the primary gas generant composition 12 is also provided.

This invention provides a lens driving device with a driving coil connected thereto that can avoid possible damages on the ends of the driving coil and any adverse effect on the spring members or the lens holder. When the ends of the driving coil are connected to the electric terminals mounted on a casing respectively, the coiling pull start section of the driving coil which begins from the beginning end of the driving coil to the electric terminal and the coiling pull finish section of the driving coil which begins from the finish end of the driving coil to the electric terminal are made into L-shaped structures. Such L-shaped structure comprises a lens holder lateral section extending horizontally and a terminal lateral section extending vertically.

The present invention relates to a low-temperature shearing rheopectic die-casting process. It is characterized by that said process includes the following steps: (1), making alloy melt be passed through feeding device and be fed into turning conveying pipe, and adopting conveying pipe with low rotating speed to control cooling and implement splat cooling of molten metal and stirring of primary stage of coagulation; (2), making the melt with lots of crystal nucleus be flowed into a crystallization furnace, utilizing slurry microstructure on-line detection technique to control and detect growth form of nascent phase and solid-phase rate of slurry; and (3), making the slurry be injected into pressure chamber of die-casting machine to make directly-forming.

An ice dispensing chute mechanism is characterized by an ice chute adapted for attachment at an upper ice inlet end to an ice retaining bin at an ice outlet from the bin. An actuating arm is pivotally mounted on the ice chute and has a lower end for being contacted and moved by a receptacle into which ice is to be dispensed from a lower ice discharge end of the chute and an upper end for contacting and moving a linkage mechanism upon rotation of the actuating arm by the receptacle. The linkage mechanism is pivotally mounted on the ice chute and is coupled to an ice gate that is linearly moved by the linkage mechanism between open and closed positions that establish and interrupt communication between the upper inlet to the chute and the ice outlet opening from the bin. Movement of the linkage mechanism by the actuating arm operates the linkage mechanism to translate the rotational movement of the actuating arm into linear movement of the ice gate between its open and closed positions to dispense ice and to cease dispensing ice into the receptacle. The ice chute consists of two halves that snap together in a releasable manner to permit easy disassembly of the ice chute for cleaning, repair or replacement of parts. The upper inlet to the ice chute is configured to impart to ice particles a trajectory through the chute that guides the ice particles into the receptacle while preventing the vast majority of the ice particles from contacting interior surfaces of the chute.

The invention discloses a PVC resin with ultra-low degree of polymerization and a manufacturing method thereof. In the invention, a polymerization method is adopted to carry out polymerization reaction, the reaction temperature is 60-64 DEG C, and the reaction pressure is less than 1.0 MPa; a first chain transfer agent is added when the polymerization reaction is carried out for 0-30min, and then0.005-0.012% of vinyl chloride monomer (VCM) is added; a second chain transfer agent is added when the polymerization reaction is carried out for 60-90min, and then 0.005-0.02% of monomer is added toobtain the PVC resin with ultra-low degree of polymerization. The PVC resin manufactured by the invention has the advantages of the average degree of polymerization below 500, high apparent density, low melting and gelatinization temperature, low melt viscosity, good transparency, short plasticization time and favorable processability and the like, and the phenomenon of accelerating products agingdue to the transfer of plasticizer does not appear in machining process.

The invention discloses a fermented yoghourt soft ice cream milk sauce containing various probiotics. The milk sauce comprises, by mass, 70-85% of raw milk or reconstituted milk, 10-30% of a sweetener, 0.3-1.2% of a compounded thickening emulsifier, 0-5% of oil, 0-10% of a dairy product raw material, 0.005-0.02% of a starter and 0.0085-0.065% of probiotics, and the sum of the mass percentages of all above raw materials is 100%. The invention also discloses a production method of the milk sauce. The shelf life of the milk sauce stored at 4-10 DEG C can reach 21 d; the shelf life of the milk sauce stored in a refrigeration manner can reach 12 months; and ice cream obtained by using the milk sauce has the advantages of smooth and fine texture, smooth mouthfeel, and sour-sweet and tasty taste.

The invention relates to a moderate-strength aluminum liquid cooled shell welding method. The method comprises the following steps: step S1, machining welding parts; step S2, pre-treating the parts; step S3, welding, wherein the distance from a seal weld to the inner wall of a liquid cooling flow channel is W1; the fusion depth D1 of the electron beam EB1 weld is equal to the summation of the thickness D of a cover plate, the thickness d of a solder material and (3-4)mm; a surface focus is adopted for welding; the scanning amplitude value of the electron beams is 0.2mm to 0.4mm; a finished weld adopts defocusing welding; the fusion depth D2 of the finished electron beam EB2 weld is 2mm to 4mm; the appearance condition of the electron beam weld is checked after welding; step S4, performing vacuum braze welding treatment; step S5, machining the shell after welding until a final product is obtained. The method disclosed by the invention has the advantages of realizing reliable welding of an embedded cover plate and a chamber body by adopting a reasonable joint design and electron beam welding and vacuum braze welding techniques, and greatly improve the maturity of a preparation technique of a liquid cooling project.

Use of starch(es) and starch derivatives in frozen desserts for improved meltdown and shape retention, including reduced expansion and contraction of the frozen dessert when transported at high altitudes, e.g., over mountain ranges. These improved characteristics are retained in the frozen dessert even after multiple heat shock cycling. The starch(es) and starch derivatives inhibit ice crystal formation in frozen after heat shock cycling.